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Reverted a change made in version 8.1.154. The implementation is 

wrong, and it needs revisiting.  This is the cause of a number of
negative capacitances appearing in the netlist (even after accounting
for overlap with subcircuits).
This commit is contained in:
Tim Edwards 2021-09-28 21:26:27 -04:00
parent 73929a0bcc
commit 36864bc79e
2 changed files with 6 additions and 1 deletions
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2
VERSION
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@ -1 +1 @@
8.3.210 8.3.211

5
extract/ExtSubtree.c
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@ -498,6 +498,7 @@ extSubtreeInteraction(ha)
for (oneFlat = extSubList; oneFlat; oneFlat = oneFlat->et_next) for (oneFlat = extSubList; oneFlat; oneFlat = oneFlat->et_next)
extHierAdjustments(ha, &ha->ha_cumFlat, oneFlat, &ha->ha_cumFlat); extHierAdjustments(ha, &ha->ha_cumFlat, oneFlat, &ha->ha_cumFlat);
#if 0
/* /*
* Output adjustments to substrate capacitance that are not * Output adjustments to substrate capacitance that are not
* output anywhere else. Nodes that connect down into the * output anywhere else. Nodes that connect down into the
@ -506,6 +507,9 @@ extSubtreeInteraction(ha)
* the current cell are not considered. Anything left over * the current cell are not considered. Anything left over
* has its adjusted value output. * has its adjusted value output.
*/ */
/* Disabled (9/28/2021)---This does not work as advertised. */
for (reg = ha->ha_parentReg; reg; reg = reg->nreg_next) for (reg = ha->ha_parentReg; reg; reg = reg->nreg_next)
{ {
Rect r; Rect r;
@ -535,6 +539,7 @@ extSubtreeInteraction(ha)
fprintf(ha->ha_outf, "subcap \"%s\" %lg\n", text, finC); fprintf(ha->ha_outf, "subcap \"%s\" %lg\n", text, finC);
} }
} }
#endif
/* /*
* Output adjustments to coupling capacitance. * Output adjustments to coupling capacitance.